Doing stuff on a planar surface is easy.
Another common method of illustration involves projecting the crystal structure onto a planar surface.
Consider a cylindrical hole (a pit) in a planar surface.
I found that the Min proteins can spontaneously formed planar surface waves on a flat membrane in vitro.
"Before, we would prefabricate all this on a planar surface," says Yonggang Huang, a mechanical engineer at Northwestern University in Evanston, Illinois, who's helping design the stretchy electronics.
As shown in Fig. 2, a planar surface is necessary for microwave generation at least with a size of ball lightning, which can be easily fulfilled in reality.
A planar surface with the desired dimension could not be achieved by using rods of squared section, because the etching introduced concavity of the surface.
In the paper, equation (12) is derived for a planar surface, and it is stated without proof that this is valid for arbitrary surfaces.
Even the drywall must be hung and finished with exacting precision, so that each corner, curve and planar surface is precise to 1/64th of an inch.
The collapse of χ plots for m/n ≈ 0.0 and the curved, divergent channel profiles for m/n > 0.0 highlight that these rivers are single-channel, almost non-branching rivers flowing down an inclined planar surface.
By contrast, rivers that drain surfaces capped by the Ogallala Group fan sediments show curved, divergent channel profiles (red lines), consistent with single-channel, non-branching rivers flowing directly down a planar surface.
